No denying that. SaaS started with a user problem at the center of it and as they scaled, forgot about an individual user. This only presents the user frustration and a possible solution to it.
If you're building for individual users you're not going to succeed. We all prioritize for broad success from the beginning.
I'm very into the idea of inversion of control and giving users this flexibility but I agree with GP that the SaaS company critique is misplaced. I hope you find enough success with 100X that you end up coming to the same conclusion.
I'll also add that one of your video examples is essentially a Twitter spam generator; is that the kind of feature you think SaaS companies should be prioritizing?